#include <stdio.h>
#include <unistd.h>
#include <directfb.h>
static IDirectFB *dfb = NULL;
static IDirectFBSurface *primary = NULL;
static int screen_width = 0;
static int screen_height = 0;
#define DFBCHECK(x...)       										\
  {																	\
		DFBResult err = x;											\
		if (err != DFB_OK)											\
		{															\
			fprintf(stderr, "%s. <%d>:\n\t", __FILE__, __LINE__);	\
			 DirectFBErrorFatal( #x, err ); 						\
		} 															\
	}
int main (int argc, char **argv)
{
	DFBSurfaceDescription dsc;
	DFBCHECK(DirectFBInit(&argc, &argv));
	DFBCHECK(DirectFBCreate(&dfb));
	//DFBCHECK(dfb->SetCooperativeLevel(dfb, DFSCL_FULLSCREEN));
	dsc.flags = DSDESC_CAPS;
	dsc.caps = DSCAPS_PRIMARY | DSCAPS_FLIPPING;
	DFBCHECK(dfb->CreateSurface(dfb, &dsc, &primary));
	DFBCHECK(primary->GetSize(primary, &screen_width, &screen_height));
	DFBCHECK(primary->FillRectangle (primary, 0, 0, screen_width, screen_height));
	DFBCHECK(primary->SetColor (primary, 0x80, 0x80, 0xff, 0xff));
	DFBCHECK(primary->DrawLine (primary, 0, screen_height / 2, screen_width - 1, screen_height / 2));
	DFBCHECK(primary->Flip (primary, NULL, 0));
	sleep(5);
	primary->Release( primary );
	dfb->Release(dfb);
	return 23;
}